Tool-holder.



P. B. CHRISTENSEN.- TOOL HOLDER. APPLIUATIOII FILED APB.15,190B.

989,1 17, Patented Apr. 11, 1911.

, z 4 d I 71 027268865: Inventar:

Peterlllkris tens-en I rna/L fly lu'sA (601 05 5,

' a turning tool 0 Fig.4 is a longitudinal section and 5 p sa e PETER B. CHRISTENSEN, OF NEW BRITAIN, CONNECTICUT.

TOOL-HOLDER.

Specification of Letters Patent.

Patented Apr. 11, 1911.

Application filed April 16, 1908. Serial No. 427,104.

To all whom it may concern:

Be it known that I, PETER B. CHRISTEN- smna'citizen of the United States, residing at New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Tool- Holders, of which the following is a specification.

This invention relates to tool-holders and the object of the invention is to provide a simple and effective article of this Character having. means associated therewith for positively holding the tool in position and against end thrust and chattering.

A toolholder embodying my invention may be employed with advantage in many different connect-ions and is. of especial utility when employed in connection with metalworking machines such as lathes.

"In'the drawings accompanying and forming part of this specification I have represented in detail one form of embodiment of my invention which to enable those' skilled in theart to practice the same will .be set forth at length in the following description while the novelty of theinvention will be included in the claims succeeding said description. g

"Referring to said drawings, Figure 1 is a Sbctional side elevation of a tool-holder in eluding my invention,-- represented as supported ,by a' tool, ost and shown as carrying f familiar type. Fig. 2 is a bottom planvie'w of said tool-holder. f Fig. 3 is a frontend' elevation of the same, and,

M b r-p anriew o e. s o l u 'Li l r e .ohar cters' refer to like parts throughout-the seyeralifignires dSirable? shape; it is represented as some what elongated andj-may .be made from any suitable aterial .suclia's tool steel, machine steel opiof composite construction; Such; a

' g hem 'in'tlie "drawings and is'de- Saidst'ook2 is shown as havi'n this e c ple e len h k. desig ate y f-an' desirable form closely in the slot but not too closely to prevent clamping action thereof. The slot 4 is represented as being located. in the upper side of the stock and it is shallower at the forward end than atthe rear-end. In like manner the clamping member cry-block is shallower at its forward end than at it-s rear, the under face of said clamping-member or block being upon a bevel or an angle which coincides substantially with the angular relation of the passage 3, by virtue of which said clamping member when in its working relation can hold the tool with a wedge-like action.

I prefer not to relyon the simple fit of the clamping member or block am the slot 4; to prevent the former being displaced and thereby lost when the tool-holder as a unitis moved from place to place. Positive means arc-shown for operatively connecting the clampingmember or block with the stool; and may consist of a pin as 6, rigidly connected with the stock 2 and bridging or crossing the slot 4. Said pin '6 projects through an elongated slot as 7 in, the'cl'amping member or block, the'slot'bemg-plon;

free movementof the elamp'ing'mei'nbertoward and from its operative o rworking position is in nowise afiected. It willbevious, however, that the tool-holder can safelytaken from a toolepo'storotter sue- Porting "part without possibility of the iolanipinggnember or block'beinglost.

ownward pressure is. exerted on When i the clamping member or block 5 ,'-the latter has a wedge-like action on the tool and ova ingtozthe angular disposition offthegpase" sage :3, end thrust of the tool 1s .eificie ay,

resisted, vThe clamping member or b'lo'ck'i when set revent's chattering andall lateral jectionable-movements ofthe'toiol'land like -0 to engage against I haverepresented astapped through the said "tool to hold the latterfirmly an adjusted position while the clamping member,' bloekor tongue isbeing set. Thetool can be adjusted readily lon'gn' itudinally of the passage 3, thefclampingtivel'y, to its holder in all directions. In

fact-the tool will bea's solidlyh'eld as thoughit were integralwith its holder.

In 1 of the drawings thet'ool-holder is shown as mounted in' a tool-post 9/which is "a: familiar device-in metal-worki, ,ma-

chines and particularly lathes for whi'c re'ason a detailed description of i said. tool-post -is nnnecessary anymore than to make reference to its binding-screw -10 which in the resent case isflthe medium, which ferce's the clamping member is set.

clamping-member or block 5 to'it s operative positio lji" In operation a tool-will'be inserted in the passage 3 of the stock 2 after which -the tool'will be adjusted as occasion inayrequire.

The tool-holder will "thenbe mountediin the tool-post 9', the screw .10 at point being elevated. When the tool-holder is positioned,

said screw 10 will be'run down toianfextent sufficient to cause the clampingniembe'r or block 5 to bind solidly and firmly against the 'tool. 1 If desired the adjustment ,of the Ttool can be accom'plished after the' to0l-- holder ismounted in the post and before the The .inyen'tion, however,-does not concern these features but resides in [a stock of "novel: character and means "connected therewith whereby Ia tool can kbe substantially hold while doing-its ,WO X Q, V. f

Ordinarily a tool is held at but one place; I providetfor the tool being held at several pines; "-T ie' cla'mpmg"Tmember 5 obtains-a ji jid'e bearing onthe tool and 'i tj'ma'y beh ld to. its" work by the customary C fl wiof i'th'e mehpgstfi Inf-additionto thislthe'. screw .8

also holds the-tool "by reason of whioh said I =tool can re'movea chip of 'con'siderable size the 'st'ockand' an a vantage-ren w 1 iisl el e s d tending ary screw of the usual. tool second screw can hold-the too forward of:

lQ'n n naDyFwi h prises a st'oek ha ving a longitudinally exassage, a 'slott-lntersecting said passage, 0 receive "a clamping member for 'enga 'mg' the tool, and a tapped hole in a v'ance of said slot by virtue htwhijch two clamping devices can act against the said toot, In the presentinstance' said stock is made elongated and both the slot and tapped hole extend" into thesamefrom the same surface thereof this: surface. being prefe customing member can be engaged by V est-while? a this place.

I'donot limit to the reoise 00 11;"

struction hereinbeforedescrib and i1 lus- 'trated in the accompanying draw; .ce'r-i tain Var ations. may be adopted wit n the sec e of/ my claims. l

'hatI claimis: I

1-. A 't'c o1-h oldercomprising a solid having a longitudinal straig ti-p'ass'a'get ex tending the complete length oithesame andat an angle to the longitudinalfaiis thereof said passage bein o'f uniforincro'ss sec tional area throng out its entire length,-an

elongated'slot intersecting said passageibe tween the ends of said stock, and [a tapped hole disposed at an inclination'and open ng into said passage forward of said silotQ'eombined with a screw fitted into. tapped l1ole,'a clamping block freelyfitted in;s a.1 d

slotjn a direction transverseto. said axis,-

deeper at the rear than .at the "front, .the

underside ofsaid block being on an mama tion corresponding" with that of said assage;

and a pin 'movably connecting -saidb ock ;and stock one ofthe twof last mentionedizpartsi having a slot to receive said pin,- S 8id@ 10t' beinjgelongated "in the-'jvdirotldn. bvfy 'h v merit of said block, j ,A tool holder-of the eharaeterse s p i g a b dy P t ie extending through thr eontinuing throughoutd r and d p edto tgihgueniovabljsemir in said recessand ada opposed to the bottom ofs QPP e';--f$ ide1 ex-fen p rt ni'the arrang" tools-0f greater-1 I h 

